Washer



Jan. 22 1924. 1,4s1,515

H. P. KRAFT WASHER Filed Dec. 19 1919 INVENTOR By A ttorneys,

Patented Jani. 392&

Unirea sira rss ra -:rrewrticino HENRY r. nesra', or amsnwoon, NEW masat.

WASHER.

.Application filed December 19, 1919. Serial No. 346916.

To allgwkom it 'may concem Be it known that I, HENRY P. KRAFT, a citizen of the United States of America, residing in`Ridgewood, in the County of Bergen and State of New Jersey, have invented certain new and useful Improvements in Washers, of which the following is a specification.

This invention relates to improvements in I washers, and is particularly directed to a novel Construction of ring Washer for use in pneumatic tire valves.

ln the use of large sized tires, particularly large truck tires, tis desirable to form a base on the valve which is of considerably larger dimensions than those in 'ordinary use in order that the relatively thick inner" tube may be adequately clamped to the tire valve casing. It is also desirable to have a correspondingly large'rng Washer which if made of solid metal is relatively expensive. i According to the present invention, I providea washer which'is particularly ada tedfor use in this connection, which is ma e of sheet metal and which is adapted or use either side up, so that in attaching the Valves to the .tubes it is a matter of ndifierence which side of the ring Washer lies next to the inner tube. Hence the operation of as- Figf is a plan of the ring Washer.

Referring first tovFigs. 1 to 3, let A indicate the .casing of a tire alvewhich adapted for use in connection with-tires of large diameter, such as areused pi'incipally in automobile trucks. Such' a tire hasanexcessively thick inner tuhe which is indicated in the drawing by the referencelettef- B. In order to`adequately clamp the ,valve casing to such `a tube, it is very desirable to have an enlarend foot portion, or base 0,

anda correspon gly large ring washer'D.

According to the present invention I 'prostructed* as te permit its use, with either side `facing the' inner tube;jthat is to say, both sides of the ring Washer are constructed `vide a sheet metal ring Washer of adequate strength and size, and which; is' so conwith clamping faces having means for engaging the surface of the inner tube, and adequately holding it against outwardstrain. in the construction shown the ring Washer is formed of sheet metal which may be corrugated as shown at E; The corrugations may be formed by stamping the metal, or

by cutting gr'ooves therein, preferably by Washer is formed by folding the metal back upon' tself, as shown at F. This folding operation is s'o performed that the inner orweb portion G of the ring Washer lies bete stamping. The marginal edge on the ring i tween the planes of the' upper and lower faces of the ring Washer, or in other words, the bead F extends on both sides of the Web. 'The washer is fornied with the usual fiat portions H which are designed to engage the fiats I I oi" the valve casing.

In Fig. 2 the marginal bead is somewhat flattened, as compared with Figure 1. Otherwise the constructions are identical.-

It will be 'seen that as the ring Washer is tightened down ,on the tube by a nut `(not shown), the marginal bead obtains a -circular grip upon the tube, while the corrugations\or grooves E 'also obtain a supple-' i mental grip. The connection thus formed between the tube and the tire valve casing is hence a 'secure and durable one. also be seen that either side of the ring Washer inay be placed against the inner tube, so that during asseinbly the worknan does nothave to pay any attention to the position of the ring washer when it is slipped over the valve casing. i

&While I have shown and described several forms of the invention, it will be understood since various changes can be nade therein without departingfrom the sprit of the invention. I 4 What I` claim isi 1. A Washer having a central web portion and a marginal beade'd portion extending on eachside beyond the web portion'.

It will ,9,5" i that I-do not wish to be limited thereto,

2(` A Washer formed of sheet metal and having a marginal beadedportion formed by folding the edge of the metal, and a web portion lying in a plane intermedate of those of the faces of thebeaded portion.

3. A Washer having acentral web portion and a mar'ginal beadedportion extending on each side beyond the web portion, the' web portion being lcorrugatedfl 4. A Washer formed of sheet metal having 5. A Washer formed of sheet metal and a web portion formed with bent-up corruhaving its periphery turned to form a pegatons, and a marginalbeaded portion sur- 'ipheral head. rounding the web portion and' extending on In wtness whereof, Ihave hereunto signed 5 each side beyond the plane of the latter, said my name. i beaded portion being formed by folding the marginal edge of the metal. w HENRY P. KRAFT. 

